When temperature increases, Kinetic energy of solid particles also increases, So due to kinetic energy interparticle distance increases and Solids are converted into liquids.

A substance condenses when the pressure exerted by its vapour exceeds the vapour pressure of the liquid or solid phase of the substance at the temperature of the surface where condensation occurs. Heat is released when a vapour condenses.

When a solid substance is heated,the heat energy makes its particles vibrate more vigorously.At the melting point,the particles of a solid have sufficient kinetic energy to overcome the strong forces of attraction holding them in fixed positions and break to form small groups of particles.

Heating a gas increases the kinetic energy of the particles, causing the gas to expand. In order to keep the pressure constant, the volume of the container must be increased when a gas is heated.

When gases in containers are heated, their molecules increase in average speed. The gas is therefore under greater pressure when its temperature is higher. This is why fires near sealed gas cylinders are extremely dangerous. If the cylinders heat up enough, their pressure will increase and they will explode.

Heating causes thermal expansion. The mass remains the same. The volume increases. And thus the density decreases.

When the gas expands against an external pressure, the gas has to transfer some energy to the surroundings. Thus, the negative work decreases the overall energy of the gas. When the gas is compressed, energy is transferred to the gas so the energy of the gas increases due to positive work.

However, in geotechnical engineering, compressive stress is represented with positive values. Compressive stress is defined in the same way as the tensile stress but it has negative values so as to express the compression since dL has the opposite direction. ( L is the length of the object.)

Work (w) is a negative number because work is done by the system (steam) on the surroundings. qh is positive because it is heat added to the system from the surroundings. Thus, the negative sign makes the efficiency a positive number.

Yes, meaning the work done by the gas is less negative for a reversible compression than an irreversible compression. For example, during a reversible isothermal compression less heat is transferred to the surroundings than during an irreversible isothermal compression.

As a result, the irreversible work of expansion is less negative than the reversible work for the same volume increase, and the irreversible work of compression is more positive than the reversible work for the same volume decrease.

In isothermal process, heat enters or leaves the system, to keep the temperature constant, so statement (c) is wrong.

It is an idealized thermodynamic process that is adiabatic and in which the work transfers of the system are frictionless; there is no transfer of heat or of matter and the process is reversible.

A thermodynamic process which is carried out at constant temperature is termed as isothermal process. During isothermal process, there is no change in internal energy of the system.

Correct Option a For an isothermal change PV = constant of gas remains constant in an adiabatic process.

For an isothermal expansion of an ideal gas, ΔU is zero.

So, enthalpy and internal energy both remain unaffected in the isothermal expansion process. Therefore, option (C) enthalpy remains unaffected, is correct.

(i) Slope of p-v graph in an siothermal process is -pV this is correct. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

An isochoric process is one in which the volume is held constant, meaning that the work done by the system will be zero. The only change will be that a gas gains internal energy.